refactoring search in app

adjusted height of EventCell

added searchbar to Categories view controller , added search in app filter for categories content

fixed some api problems throught creating some categories to work with params names and encode , added infinite scroll to eventsView Controller

updated event controller view

added Event Cell , added more tests for eventCategory and event , refactorings

refactoring

added tests to event

fetch events + event model

typo

added events view controller + refractories

configure reachability block

refactoring

refactoring categoriesViewController

added files to pbx